Gate



ATTORN EY Nw. 2o, '1923;

` R. J. MITCHELL GATE Filed Sept. l5. 1922 WITNESS:

Nov. 2o, 1923.

R. J. MITCHELL GATE 4 Sheets--Sheelz 2 Filed Sept. 15 1922 ATTORNEY WITNESS Nw. 20,1923t v f R. J. MITCHELL GATE 'zch ell,

ATTORN EY wl'rNEss:

No. 2o, 1923.

R. J. MITCHELL GATE 4 Sheets-Shee. 4

Filed Sept. 15 1922 INVENTOR ATroRNr-:Y

WITNESS:

Patented Nov. y20, 19.23.

Unirse strass ROBERT J. MITCHELL, OF ADAIR, OKLAHOMA.

GATE.

Application led September 15, 1922. Serial No. 588,448.

To all whom t may concern;

Be. it known that I, ROBERT J. MITCHELL,

a citizen of the United States, residing at Adair, in the county of Mayes and State of Oklahoma, have rinvented new and useful d Improvements` in Gates, Of which the following is a specification.

My present invention has reference toV `farm gates, and has for itsl object to producea gate which shall be automatically operated to open position by a person or vehicle approaching the gate, and likewise' moved to closedposition byk the perso-n or vehicle passing through the gateway. c

A further object is tof produce an Vautomatically operated gate of a construction that shall be freely operated under all conditions and which is not influenced by weather conditions.

A still further object is to produce an automatic gate in which latching or locking means is dispensed with.

A still further object is to produce cooperating gate sections movable a determined distance by mechanism depressed by the Wheels of a. vehicle or likewise movable such distance by a pull exerted on a flexible element by a horseman or pedestrian, and which sections will thereafter gravitate to either open or closed position.

To the attainment of the vforegoing and other objects which will present themselves as the nature of the invention is better understood, reference is to be had to the drawings in which there is" illustrated anembodiment of the improvement` reduced to practice, and wherein p Figure 1 is a plan view with the gates in closed position. n 7

Figure 2 is aside elevation thereof. Figure 3 isa' sectionalk view'on the line 3 3 of'Figure l, showing the arrangement of parts when the gates have been mechanically influenced to a.y position to permit of vthe gravitating of the gate sections to fully open position.' f

Figure 4 is a side'elevation showing the gates in fully open position. y Figure 5 is a sectional View on the line 5-5rof Figure l., c

Figure 6 is a detail of the trip mechanism. .Figure 7 is a. detail of the track member carried by the gate. I

Figure 8 is a detail sectional View of the guideway. v p

As disclosed by the drawings, the posts lbers 10.

and other supporting means for the mechanism constituting the` improvement are bolted or otherwise secured by cement supports which are embedded in theground.

gate sections are employed, but as the same Also, as disclosed by thefdrawings, two

are of similar construction, and as the mechanism operating both sections are also of the same nature, reference to one of ythe Ygate sections and ,the operating parts therefor are to be taken as equally applicable to the l other section and operating parts.

At the sides of a roadwayI erect posts, each of which being preferably constructed of sheet steel or other substantial metal, Each post includes a base and parallel yup-l rights l secured te the4 base, the uprights having their Vends over the base flanged, the

said flanged portions receiving the securing elements that pass from the concrete support through the base; VThe parallel members constituting the posts l have their outer edges flanged, as at 2 to reinforce the posts, the upper ends of the parallel members being connected, as at 3, and 0n the'connecting element 3 there are sheave wheels 4L for a purpose which will hereinafter be set forth.

To the rear and in a line with thefposts l there are other posts 5 also comprising parallel uprights 6 flanged at one or both of their edges to reinforce the same and connected at their tops. ThelowerV ends of these uprights are also flanged outwardly forming foot members through which the means that securethe same to the concrete foundation pass. In a line with thecenter and to the rear of each of the posts eithere is an upstanding member or post 7 This post may be in the nature of a metal tube, and

between the posts 5 and 6. there is supported a track 8. The track may be also in the nature of a tube which is slotted at islower center throughout its `length and which preferably has the edges of its slotted portion upturned to provide beads 9, and between these beads and the sides of thetrack member 8 there may be and preferablyA are arranged anti-frictional bearing4 mem- Each gate section is preferably formed of pipe sections to include an outer end portion 11, an inner parallel member 12, a lower connecting member 13 for the members 11 and 12, an upperconnecting member 14 for the said members 11 and 12, and any desired number of longitudinal pipe sections between the said members ll and l2, one of which beingessential, and being indicated for distinction bythe numeral l5. The upper member of the gate section is disposed at ydownward angles from the members ll and -12 to the center of the said member la, so

that the top of the gate is substantially arched downwardly. This arched portion l5 rests on a roller lr6 that is journaled in bearings between the parallel sides of the lposts l. The member l2 of the gate' section has extending rearwardly therefrom pipe sections v17 respectively which are inclined' inthe same direction and which are connected'V at their meeting ends by a suitable coupling i8, itbeing understood, of course, that couplings are employedr for connecting thek ther members of 'the gate section.

` di" rom the coupling there is a short pipeeX- tension 19` which has extending from its upper end a roller bearing 20, the mounting for which being loosely connected with the pipe member 19, and this roller bearing is designed to be received in the track 8.

l5 of the'gate section, at the center of the said bar there is a short flexible element in the nature of a chain 2l which has its end link connected to an arm 22 thatv is,'of course, disposed between the sidefmembersof the posts l, and that is also connected with a lever 23. The lever 23 is disposed to the vouter side of the posts kl and is journaled,

Ladjacent its ends in suitable bearings 24rsecured to the concrete foundation The lever 23 has its ends cranked as at 25, and to the said cranked ends there are loosely connected links 26. The links 26 are loosely con- Vnected to one of the parallel arnis27 of rock- The second arm 28 of each of ing levers. the rocking levers-is disposed at an opposite 'angle to the arm 27, .the connecting element 29 between the arms 27 and 23 beine' journaled ina vertically disposed bearing 30 secured to a concrete foundation.

The arm 2S of each of the rocking levers is connected by va link 3l to one of theangle i arms 32 of a throw lever. For distinction, the second angle arm of the throw lever is indicated by the numeral 32', and the bearing'ifor the said throw lever is indicated by ,the numeral 33.

Arranged longitudinally of and disposed centrally between the opposed pairs of throw f levers there is journaled in bearingsBll the operating lever 35. f The'lever 35 has cranked portions 36 of alength whereby the same will. be contacted by the wheels of vehicles approaching or. leaving the gateway, the outer ends ofthe said operating levers 35 being also cranked, as at 37, the said cranked ends 37 being disposed between the angle arms 32( of the throw lever and in the path of contact with either of said arms.

' Arrangedoutwardly of the cranked: ends Connected to the central `bar or member of the operating levers 35 there are uprights 38,'the upper Lends of which being provided with eyes 39. In each eye there is received a hook ll0 that has attached thereto a coiled .spring 4l, the outer or free ends of the said springs being also provided with hooks e2 which are designed to be received in eyes 43 on the cranked ends of the operating lever Y arms 32 of the throwlevers, causing the same to swing the .rocking levers and through their link connection to likewise swing the lever y23, causing the arms 22 thereofto draw on the chains 2l to move the Lgate sections rearwardly or to open position. lhen the center of the arched upper portion of each ot the gate sections passes over the roller 16 i so the gate sections, by their own weight will,

swing to fully open position. The springs will return the operating lever to initial position, but the cranked nends thereof will not contactV with the outer arms 32 of the throw levers so that the wheels of the vehicle, will pass over the inner cranks of the operating lever without further iniluencing the gate sections,

As the vehicle travels through the gateway, the wheels thereofwill contact with theA inner cranks on the second operating shaft, 1

causing the depression of thek said shaft, and causing the cranked ends thereof to swing against the outer arms 32vof the throw lever, reversing the swinging of the lever 29 f andthe arm 28 thereof, causing the said arm to influence the chains -to move the gate ,sections to `closing position sufficient to bring the central portion yof the arched upper bar from` theroller, and thereaftery allow. the gates vby their own weight to gravitate to fully closed position. Cent-rally between the gates there are varrange-d on a concrete foundation spaced upstanding vstop members t4 respectively which receive there- .L between the lower bars of the gate sections. The stop members may be and preferably are constructed of tubes, the upper longitudinal elements of which having their ends bent at outward angles to thevertical ele ments "which, are receivedin the foundation, Vand by thisarrangeme'nt it will'be seen that noy latching means is required between the gate sections.

Connected to the vertical member l2 of each of the gate sections there are flexible elements which are respectively trained around the mentioned sheave wheels 4 on the posts l and which are directed along the sides of the posts l through suitable guide members 4:5 in posts 46. The ends of the flexible members are provided with handles a?, and a person or horseman approaching the gates will pull upon one of the handles to swing one of the gate sections to open position in a manner which will be apparent, while a pull on the handle of the iexible element on the opposite side of the gate will cause the gate section to move to closed position.

It is believed that the foregoing descrip-- tion, when taken in connection with the drawings will Vfully set forthv the construc-l tion,-operation and advantages of the improvement to those skilled in the art to which this invention relates, but the right is reserved to make all such changes therefrom as fall within the scope of what is claimed.

Having described the invention, I claim z- 1. Two opposed gates each having their upper longitudinal bars inclined downwardly from the ends to the cent-er thereof and having their rear ends provided with substantially V-shaped extensions, posts comprising spaced uprights between which the gates are arranged, and another post to the rear of each gate, a slotted guide supported between the intermediate and rear posts, and anti-frictional elements supported on the rear of each gate and received in each guide, a roller journaled through the front posts and on which the angle upper bar of the gates rest, levers journaled in bearings disposed transversely at the front of the gates and having angle arms thereon, flexible means on thegates connected to said arms, and means arranged to the sides and transversely of the gates susceptible to swinging movement and associated with means for imparting a swinging movement tothe levers to slide the gates to bring the central portion of the upper bars thereof over the rollers to permit of the gates gravitating the remainder of their sliding movement, said gates being halted in such movement by contact with the rollers, and means on the roadbed between the gates for sustaining the gates against swinging movement. v

2. Two opposed gates each having their upper1 'bars inclined downwardly7 from-the `ends to the center thereof, posts, roller bearthe gates elevated, longitudinally eXtending levers having crankedy ends iournaled in bearings transversely of the end posts, arms thereon, flexible elements connecting the arms with the gates.y rocking levers connected with the ends of the first mentioned lever, throw levers having angle arms one of which being connected with each rocking lever, a cranked operating lever disposed transversely and arranged centrally between the throw levers, said rocking levers having cranked ends in `the path ofcontact with the arms of the throw levers, spring means influencing the operating levers tofnormally retain the cranks thereof in vertical position, means for disassociating the spring means and the operating lever.

ln testimony whereof l aiix my signature.

ROBERT J. MITCHELL. 

